Albert H. DeSalvo’s body will be exhumed to allow for new forensic testing that may conclusively prove DeSalvo murdered Mary Sullivan in her Boston apartment in 1964, the last killing attributed to the Boston Strangler who terrorized Greater Boston for two years in the early 1960s.Suffolk District Attorney Daniel F. Conley said that a DNA match has been made between DeSalvo, the self-confessed Boston Strangler, and the murder of 19-year-old Sullivan, who was raped and murdered and “her body desecrated” in her Charles Street home on Jan. 4, 1964....